feat(douyu): 支持账号批量撤回并刷新未分配状态

新增按勾选或标签批量撤回账号归属，撤回只处理确实已分配的账号。账号管理和分配管理增加可见时自动刷新、窗口聚焦刷新及手动刷新，解决批量登录完成后未分配账号延迟出现。

tests/test_account_assign_filter.py

@@ -213,6 +213,38 @@ class TestAllMatchingAssign(_Base):
             self.session.refresh(account)
             assert account.assigned_to is None
 
+    def test_unassign_all_matching_by_tag_only_touches_assigned_tag(self):
+        """按标签撤回：只动该标签下当前已分配的账号，未分配和别的标签都保留。"""
+        assigned_a = self.make_account(
+            "mut-a-assigned", tag="撤回标签", assigned_to=self.support.id
+        )
+        assigned_a_2 = self.make_account(
+            "mut-a-assigned-2", tag="撤回标签", assigned_to=self.other.id
+        )
+        unassigned_a = self.make_account("mut-a-free", tag="撤回标签")
+        assigned_b = self.make_account(
+            "mut-b-assigned", tag="保留标签", assigned_to=self.support.id
+        )
+
+        result = batch_assign_accounts(
+            BatchAssign(
+                all_matching=True,
+                assign_status="assigned",
+                tag="撤回标签",
+                assigned_to=None,
+            ),
+            db=self.session,
+            current=self.admin,
+        )
+
+        assert result["count"] == 2
+        for account in (assigned_a, assigned_a_2, unassigned_a, assigned_b):
+            self.session.refresh(account)
+        assert assigned_a.assigned_to is None
+        assert assigned_a_2.assigned_to is None
+        assert unassigned_a.assigned_to is None
+        assert assigned_b.assigned_to == self.support.id
+
     def test_explicit_ids_still_work(self):
         """旧路径（显式勾选）不能被 all_matching 改动带坏。"""
         a = self.make_account("me-a")
@@ -230,6 +262,26 @@ class TestAllMatchingAssign(_Base):
         assert a.assigned_to == self.support.id
         assert b.assigned_to is None
 
+    def test_explicit_unassign_counts_only_assigned_accounts(self):
+        """显式勾选混合未分配账号时，撤回只处理有归属的那些并返回真实数量。"""
+        assigned = self.make_account("mul-assigned", assigned_to=self.support.id)
+        unassigned = self.make_account("mul-free")
+
+        result = batch_assign_accounts(
+            BatchAssign(
+                account_ids=[assigned.id, unassigned.id],
+                assigned_to=None,
+            ),
+            db=self.session,
+            current=self.admin,
+        )
+
+        assert result["count"] == 1
+        self.session.refresh(assigned)
+        self.session.refresh(unassigned)
+        assert assigned.assigned_to is None
+        assert unassigned.assigned_to is None
+
     def test_all_matching_without_match_is_rejected(self):
         import pytest
         from fastapi import HTTPException